Topological Superfluid in P-band Optical Lattice
POSTER
Abstract
By studying p-band fermionic system with nearest neighbor attractive interaction we find translation symmetry protected $Z_{2}$ topological superfluid (TSF) that is characterized by a special fermion parity pattern at high symmetry points in momentum space $k=$ $(0,0)$, ($0$, $\pi $), ($\pi $, $0$), ($\pi $, $\pi $). Such $Z_{2}$ TSF supports the robust Majorana edge modes and a new type of low energy excitation - (supersymmetric) $Z_{2}$ link-excitation.
*The authors would like to thank W. M. Liu, C. Wu,H. Zhai, S. Chen for helpful conversations. This work is supported by NFSC Grant No. 10874017, 11174035, National Basic Research Program of China (973 Program) under the grant No. 2011CB921803.